1. PHED 1 Applied Physiology Energy Balance
AS PE
PHED 1
Applied Physiology
Energy Balance

2. Energy Balance- AS PE
We need to eat to obtain enough energy to complete our daily tasks
We have to keep pace with our body’s metabolism – Basal Metabolic Rate
We must meet the energy needs of our level of physical activity

3. Key point:
The amount of energy a person needs depends on their level of physical activity and their body weight
The more active = the more they can consume (food) without gaining weight.

4. Percentage body fat:
The proportion of body fat to lean body tissue (muscles, bones and organs)
Need to balance your intake with expenditure
Any food taken in that is not burnt off will be stored as body fat

5. Body Fat Excess, unused energy stored as fat
Lean (bones, tissue, organs)
Body Mass
Body fat
On average:
Men have 10 – 20% body fat
Women have 15 – 25%

6. Ways to measure body fat
Skinfold
Bioelectric impedance – What is this? Use book.
Water displacement – water out?
VLE Handout

7. Obesity
A condition in which excessive fat accumulation in tissue impairs health
Above 40% body fat
Linked to type 2 diabetes
Heart Disease
Stroke (blocked blood vessels)
Hypertension (Cholesterol, HDL, LDL)
Linked to some cancers

8. BMI Body mass Index: Indication of height to weight ratio
Divide your weight (kg) by your height (m) then divide the answer by your height again to get your BMI
If you weigh 70kg and you're 1.75m tall, divide 70 by The answer is 40. Then divide 40 by The answer is This is your BMI.
Obese is a BMI of 25 or above (Fig 2.1 of text book – page 18)